Monkey-wrench.



PATENTED NOV. 2l, 1905.

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MONKEY-WRENCH.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application flied August 8,1905. Serial No. 273,243.

T0 (all whom, it ntcty concern:

Be it known thatI, GEORGE H. BELL, a citizen of the United States, residing at Passaic, in the county of Passaic and State of New Jersey, have invented certain new and useful llmprovements in Monkey-Wrenches, of which the following is a specification.

My invention relates to improvements in monkey-wrenches, and refers particularly to` a wrench especially adapted for use as a pipewrench, as well as for the ordinary uses of a monkey-wrench.

The main object of my invention is the provision of a wrench which Vwill be light and compact and which lwill be equally useful in the handling of pipe and similar articles, as well as in the handling of angular-shaped objects, such as nuts and bolt-heads.

Another object of my invention is the provision of a device of the character described which will be strongly and simply made and which will be eflicient and practical in every particular.

l/Vith these objects in View my invention comprises a wrench consisting of a bar or shank having a handle on one end and a jaw pivoted to the other end, a casing pivoted to said jaw, means for adjustably retaining said casing against the shank, a jaw carried in said casing, and means for opening and closing said jaw.

My invention further consists in certain other novel features of construction and combination of parts as herein set forth.

Figure l represents a side elevation of my improved wrench with the jaws partially open, and shows in dotted lines the position the parts assume when pressure is applied to the handle and the object is clamped between the jaws. Fig. 2 representsa similar view with part of the casing broken away to show the interior arrangement of the parts, and Fig. 3 represents a detail view in perspective of the dog or lever which is pivoted to the head of the wrench.

Referring to the drawings, the letter A designates the bar or shank of the wrench, which is provided at one end with the handle B and to the other end at C is pivoted the head D, which forms the outer jaw of the wrench and is provided with serrated teeth E. A casing F, provided with an extension G, partially surrounds three sides of the shank of the wrench and is pivotally secured to the head by means of the pin H, which passes through a downwardly-projecting lug J, formed on the head. The shank is provided with an angularly-disposed slot K, and a screw-pin L passes through this slot and is secured in the casing, and by means of this fastening the casing is allowed a slight downward movement. Within the casing is slidably mounted a bar M, which is provided at the outer end with a head, forming a jaw N and at the other end is formed with a threaded stem O. The casing is formed with a cut-out portion P, which is adapted to receive the milled and threaded thu mb-nut Q, which rides on the threaded stem O and serves to open andclose the jaw.

The dog or lever R, formed with extensionlugs S, tits within the casing and is secured at the outer end by having the pin H pass through said extension-lugs. At the other end the lever is provided with a recess T, which fits over the milled thumb-nut, and a screw-pin U passes through the lever and is secured in the casing and serves to hold the lever in position on the thumb-nut.

From this description, taken in connection with the drawings, it will be seen that when an object is placed between the jaws and pres-` sure is applied to the handle the jaws by reason of their pivotal connections are brought closer together and clamp the object the more securely as the pressure is applied. The teeth of the jaws are placed at opposite inclines, so that the gripping tendency is the stronger. The spring V is secured to the shank of the wrench at Y and presses outward onthe lever and serves to return the parts to the expanded or open position when the pressure is taken off the handle.

A screw-pin W ,is secured in the casing and passes through a hole X for that purpose, formed in the shank, and this pin secures the casing against movement, and thus the w ren ch may be used as an ordinary straight monkeywrench, or upon the removal of this pin the wrench forms an excellent device for handling pipe.

1t will thus be evident that I provide a wrench which will answer every purpose of an ordinary monkey-wrench and which, as well, will be particularly useful as a pipewrench, which consists of but few and simple parts, and is thus not liable to get out of order, and which is practical in every feature.

I claim- 1. A wrench consisting of a bar or shank, a handle on said shank, a jaw pivoted to said shank, a Casing pivoted to said jaw and ad- IOO justahly connected to said shank, a jaw secured in said casing, and means for opening and closing said last-mentioned jaw.

2. A monkey-wrench consisting of a bar or shank provided with a handle, a jaw pivoted to said shank, a casing pivoted to said jaw and secured to the shank, a jaw carried in said casing and means for opening and closing said jaw, said jaws adapted to grasp the object more tightly as pressure is applied to the handle.

3. A wrench consistingotl a shank provided with a handle and having a head forming a jaw pivoted thereto, a casing' pivoted to said jaw and carrying` a complementary jaw, said jaws adapted to be compressed upon an article upon the application of pressure to the handle.

t. A wrench having a shank and a pivoted outer-jaw member, a casing connected with said jaw, a jaw and means for operating the same carried by said casing, said jaws adapted to he compressed upon an article when pressure is applied to the shank, and means for expanding; said jaws when pressure is removed.

5. A wrench consisting of a shank provided with a handle, an outer jaw pivoted to said shank, a lever connected to the outer jaw, a casing1 pivotally secured to the jaw and adjustably secured to the shank, a jaw carried in said casing, a nut for operating said last-mentioned jaw, a lever connected to the outer jaw and formed with a recess to receive said nut, and means for normally holding the jaws in eX- panded position.

In testimony whereof I affix my signaturein presence of two witnesses.

GEORGE H. BELL.

Witnesses:

J. H. DUNNING, J. M. FnRRIs. 

